Major payment networks and Coinbase launch competing stablecoin initiatives as AI commerce battle heats up

A battle for the future of AI-driven commerce is underway as Visa, Mastercard, and Coinbase launch competing payment systems. The card networks are extending their existing rails with tokenized credentials for AI agents, while Coinbase's x402 protocol enables direct stablecoin settlement. To hedge their bets, Mastercard is acquiring stablecoin platform BVNK for $1.8B and Visa's stablecoin pilot has hit a $7B run rate, signaling a two-front war for the next generation of payments.

Agentic commerce payment rails

• ▪Card-based rails are suited for consumer retail purchases where fraud protection is critical, while stablecoin rails are better for high-frequency, low-value machine payments
• ▪A competition has emerged between two payment systems for AI agents: tokenized card credentials from Visa and Mastercard, and stablecoin settlement from Coinbase

Card network tokenization initiatives

• ▪Visa launched "Visa Intelligent Commerce," which provides AI developers with "AI-Ready Cards" that use a tokenized credential instead of card details
• ▪Partners for Mastercard's Agent Pay include Microsoft and IBM, while Visa's partners for Intelligent Commerce include Anthropic, OpenAI, and Samsung
• ▪In April 2025, Mastercard launched "Agent Pay," which uses "Agentic Tokens" to allow verified AI agents to transact on a consumer's behalf

Stablecoin settlement protocols

• ▪Coinbase and financial technology firm Cardless developed a stablecoin-secured credit card for applicants who may not qualify for traditional unsecured cards
• ▪Coinbase launched the x402 protocol in May 2025, which uses the HTTP 402 "Payment Required" status code to settle payments in USDC
• ▪In its first year, Coinbase's x402 protocol processed over 169 million payments across 590,000 buyers and 100,000 sellers
• ▪There are reports that Visa, Mastercard, Stripe, and Coinbase are in talks to launch a new, shared stablecoin platform

Agent fraud protection

• ▪Visa and Cloudflare launched a "Trusted Agent Protocol" to help merchants distinguish between sanctioned AI agents and malicious bots
• ▪Visa cited a 4,700% surge in AI-driven traffic to U.S. retail sites as a reason for developing its Trusted Agent Protocol
• ▪Card networks hold a structural advantage in agentic commerce due to established systems for fraud scoring, chargebacks, and dispute resolution

Card network stablecoin acquisitions

• ▪In March 2026, Mastercard agreed to acquire the stablecoin platform BVNK for up to $1.8 billion
• ▪Visa is collaborating with Coinbase to align its Trusted Agent Protocol with Coinbase's x402 protocol for interoperability
• ▪By April 2026, Visa's stablecoin settlement pilot reached a $7 billion annualized run rate and had expanded to nine blockchains

Consumer payment deployments

• ▪Amazon's Bedrock AgentCore Payments service integrated Coinbase's x402 protocol for machine-to-machine micropayments on the Base network
• ▪OpenAI's "Instant Checkout in ChatGPT," launched in September 2025, settles payments over card rails using a protocol co-developed with Stripe
• ▪Amazon's "Buy for Me" agent makes purchases from third-party sites by autofilling the user's existing credit card information